EP 0681371 B1 20000719 - Method and arrangements for analogue-digital converters
Title (en)
Method and arrangements for analogue-digital converters
Title (de)
Verfahren und Anordnung für einen Analog-Digital-Konverter
Title (fr)
Procédé et dispositif pour un circuit convertisseur analogue-numérique
Publication
Application
Priority
SE 9401537 A 19940504
Abstract (en)
[origin: EP0681371A1] A method and an arrangement for reducing the influence from distortion which is produced when an electrical signal, which is divided into two components (I, Q), is converted from analogue to digital form. The signal is divided in a phase detector in which it is phase detected with respect to two reference signals, phase shifted 90 DEG with respect to each other. The two components are frequency coded by the reference signals which are provided with a periodic frequency sweep (18). After the conversion into digital form, each of the components are frequency decoded so that they, with respect to frequency, appear as narrow band signals while possible harmonics which are part of the distortion, are distributed over a frequency range defined by the size of the periodic frequency sweep. <IMAGE>
IPC 1-7
IPC 8 full level
H03M 1/06 (2006.01); H03M 1/08 (2006.01); H03M 1/12 (2006.01)
CPC (source: EP US)
H03M 1/0614 (2013.01 - EP US); H03M 1/12 (2013.01 - EP US)
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 0681371 A1 19951108; EP 0681371 B1 20000719; DE 69518034 D1 20000824; DE 69518034 T2 20010322; SE 502813 C2 19960122; SE 9401537 D0 19940504; SE 9401537 L 19951105; US 5596323 A 19970121
DOCDB simple family (application)
EP 95850086 A 19950503; DE 69518034 T 19950503; SE 9401537 A 19940504; US 43453695 A 19950504